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#
# Author:: John Keiser (<jkeiser@opscode.com>)
# Copyright:: Copyright (c) 2012 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require 'chef/chef_fs/file_system/base_fs_object'
require 'chef/chef_fs/file_system/not_found_error'
require 'chef/chef_fs/file_system/operation_failed_error'
require 'chef/role'
require 'chef/node'
require 'chef/json_compat'
class Chef
module ChefFS
module FileSystem
class RestListEntry < BaseFSObject
def initialize(name, parent, exists = nil)
super(name, parent)
@exists = exists
end
def data_handler
parent.data_handler
end
def api_child_name
if name.length < 5 || name[-5,5] != ".json"
raise "Invalid name #{path}: must end in .json"
end
name[0,name.length-5]
end
def api_path
"#{parent.api_path}/#{api_child_name}"
end
def org
parent.org
end
def environment
parent.environment
end
def exists?
if @exists.nil?
begin
@exists = parent.children.any? { |child| child.name == name }
rescue Chef::ChefFS::FileSystem::NotFoundError
@exists = false
end
end
@exists
end
def delete(recurse)
begin
rest.delete(api_path)
rescue Timeout::Error => e
raise Chef::ChefFS::FileSystem::OperationFailedError.new(:delete, self, e), "Timeout deleting: #{e}"
rescue Net::HTTPServerException => e
if e.response.code == "404"
raise Chef::ChefFS::FileSystem::NotFoundError.new(self, e)
else
raise Chef::ChefFS::FileSystem::OperationFailedError.new(:delete, self, e), "Timeout deleting: #{e}"
end
end
end
def read
Chef::JSONCompat.to_json_pretty(minimize_value(_read_json))
end
def _read_json
begin
# Minimize the value (get rid of defaults) so the results don't look terrible
root.get_json(api_path)
rescue Timeout::Error => e
raise Chef::ChefFS::FileSystem::OperationFailedError.new(:read, self, e), "Timeout reading: #{e}"
rescue Net::HTTPServerException => e
if $!.response.code == "404"
raise Chef::ChefFS::FileSystem::NotFoundError.new(self, e)
else
raise Chef::ChefFS::FileSystem::OperationFailedError.new(:read, self, e), "HTTP error reading: #{e}"
end
end
end
def chef_object
# REST will inflate the Chef object using json_class
data_handler.json_class.json_create(read)
end
def minimize_value(value)
data_handler.minimize(data_handler.normalize(value, self), self)
end
def compare_to(other)
# TODO this pair of reads can be parallelized
# Grab the other value
begin
other_value_json = other.read
rescue Chef::ChefFS::FileSystem::NotFoundError
return [ nil, nil, :none ]
end
# Grab this value
begin
value = _read_json
rescue Chef::ChefFS::FileSystem::NotFoundError
return [ false, :none, other_value_json ]
end
# Minimize (and normalize) both values for easy and beautiful diffs
value = minimize_value(value)
value_json = Chef::JSONCompat.to_json_pretty(value)
begin
other_value = Chef::JSONCompat.parse(other_value_json)
rescue Chef::Exceptions::JSON::ParseError => e
Chef::Log.warn("Parse error reading #{other.path_for_printing} as JSON: #{e}")
return [ nil, value_json, other_value_json ]
end
other_value = minimize_value(other_value)
other_value_json = Chef::JSONCompat.to_json_pretty(other_value)
[ value == other_value, value_json, other_value_json ]
end
def rest
parent.rest
end
def write(file_contents)
begin
object = Chef::JSONCompat.parse(file_contents)
rescue Chef::Exceptions::JSON::ParseError => e
raise Chef::ChefFS::FileSystem::OperationFailedError.new(:write, self, e), "Parse error reading JSON: #{e}"
end
if data_handler
object = data_handler.normalize_for_put(object, self)
data_handler.verify_integrity(object, self) do |error|
raise Chef::ChefFS::FileSystem::OperationFailedError.new(:write, self), "#{error}"
end
end
begin
rest.put(api_path, object)
rescue Timeout::Error => e
raise Chef::ChefFS::FileSystem::OperationFailedError.new(:write, self, e), "Timeout writing: #{e}"
rescue Net::HTTPServerException => e
if e.response.code == "404"
raise Chef::ChefFS::FileSystem::NotFoundError.new(self, e)
else
raise Chef::ChefFS::FileSystem::OperationFailedError.new(:write, self, e), "HTTP error writing: #{e}"
end
end
end
def api_error_text(response)
begin
Chef::JSONCompat.parse(response.body)['error'].join("\n")
rescue
response.body
end
end
end
end
end
end
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